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Discrete Math and Analyzing Social Graphs
Week 1
Number of Segments

QuizQuiz • 15 min15 minutes

Number of Segments

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Due DateFeb 24, 2:59 AM ESTFebruary 24, 2:59 AM EST

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Number of Segments

Graded Quiz • 15 min

Due Feb 24, 2:59 AM EST

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Number of Segments

Latest Submission Grade

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1.

Question 1

What is the number of segments in the picture below? (Each segment joins two circles.)

1 / 1 point

6

Correct

Exactly! It is equal to $\binom{4}{2}=6$ .

2.

Question 2

What is the number of segments in the picture below? (Each segment joins two circles.)

1 / 1 point

10

Correct

Exactly! It is equal to $\binom{5}{2}=10$ .

3.

Question 3

What is the number of segments in the picture below? (Each segment joins two circles.)

1 / 1 point

45

Correct

Exactly! It is $\binom{10}{2}=\frac{10 \times 9}{2}=45$ .